Display device

ABSTRACT

A display panel and a display device are provided by the present disclosure, wherein the display panel includes a pixel region having a plurality of pixels. The pixel region includes a first area and a second area, wherein the transmittance of the second area is greater than the transmittance of the first area. The second area has a coverage, and a width of the coverage is not less than 0.43 millimeters.

BACKGROUND OF THE DISCLOSURE 1. Field of the Disclosure

The present disclosure relates to a display device, and moreparticularly to a display device having an optical sensing module.

2. Description of the Prior Art

In current electronic devices, functional elements such as opticalsensing module are disposed in the display region of the electronicdevice in order to increase the screen-to-body ratio, so as to reducethe size of the non-display region. However, because a portion of theelectronic elements or the wires in the display region may affect thelight receiving effect of the optical sensing module, to improve thelight receiving effect of the optical sensing module has become animportant issue in electronic industry.

SUMMARY OF THE DISCLOSURE

One of the purposes of the present disclosure is to provide a displaydevice having an optical sensing module, wherein the pixels of thedisplay device may include different designs to improve the lightreceiving effect of the optical sensing module.

In some embodiments, a display panel is provided by the presentdisclosure, wherein the display panel includes a pixel region having aplurality of pixels. The pixel region includes a first area and a secondarea. The transmittance of the second area is greater than thetransmittance of the first area. The second area has a coverage with awidth of not less than 0.43 millimeter (mm).

In some embodiments, a display device is provided, wherein the displaydevice includes the display panel mentioned above and an optical sensingmodule. The optical sensing module is disposed corresponding to thesecond area of the pixel region of the display panel. The opticalsensing module includes an aperture, wherein the aperture can acceptlights through the second area. The aperture has a width, and the widthof the aperture is less than the width of the coverage of the secondarea.

These and other objectives of the present disclosure will no doubtbecome obvious to those of ordinary skill in the art after reading thefollowing detailed description of the embodiment that is illustrated inthe various figures and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 schematically illustrates a top view of an electronic deviceaccording to a first embodiment of the present disclosure.

FIG. 2 schematically illustrates a cross-sectional view of theelectronic device according to the first embodiment of the presentdisclosure.

FIG. 3 schematically illustrates the distribution of pixels of theelectronic device according to the first embodiment of the presentdisclosure.

FIG. 4 schematically illustrates the distribution of pixels of anelectronic device according to a variant embodiment of the firstembodiment of the present disclosure.

FIG. 5 schematically illustrates the distribution of pixels of anelectronic device according to another variant embodiment of the firstembodiment of the present disclosure.

FIG. 6 schematically illustrates the distribution of pixels of anelectronic device according to yet another variant embodiment of thefirst embodiment of the present disclosure.

FIG. 7 schematically illustrates the distribution of pixels of anelectronic device according to a second embodiment of the presentdisclosure.

FIG. 8 schematically illustrates the distribution of pixels of anelectronic device according to a variant embodiment of the secondembodiment of the present disclosure.

FIG. 9 schematically illustrates a cross-sectional view of an electronicdevice according to a third embodiment of the present disclosure.

FIG. 10 schematically illustrates the driving process of the electronicdevice according to the first embodiment of the present disclosure.

FIG. 11 schematically illustrates the driving process of the electronicdevice according to the third embodiment of the present disclosure.

DETAILED DESCRIPTION

The present disclosure may be understood by reference to the followingdetailed description, taken in conjunction with the drawings asdescribed below. It is noted that, for purposes of illustrative clarityand being easily understood by the readers, various drawings of thisdisclosure show a portion of the electronic device, and certain elementsin various drawings may not be drawn to scale. In addition, the numberand dimension of each element shown in drawings are only illustrativeand are not intended to limit the scope of the present disclosure.

Certain terms are used throughout the description and following claimsto refer to particular elements. As one skilled in the art willunderstand, electronic equipment manufacturers may refer to an elementby different names. This document does not intend to distinguish betweenelements that differ in name but not function.

In the following description and in the claims, the terms “include”,“comprise” and “have” are used in an open-ended fashion, and thus shouldbe interpreted to mean “include, but not limited to . . . ”.

It will be understood that when an element or layer is referred to asbeing “disposed on” or “connected to” another element or layer, it canbe directly on or directly connected to the other element or layer, orintervening elements or layers may be presented (indirectly). Incontrast, when an element is referred to as being “directly on” or“directly connected to” another element or layer, there are nointervening elements or layers presented.

Although terms such as first, second, third, etc., may be used todescribe diverse constituent elements, such constituent elements are notlimited by the terms. The terms are used only to discriminate aconstituent element from other constituent elements in thespecification. The claims may not use the same terms, but instead mayuse the terms first, second, third, etc. with respect to the order inwhich an element is claimed. Accordingly, in the following description,a first constituent element may be a second constituent element in aclaim.

It should be noted that the technical features in different embodimentsdescribed in the following can be replaced, recombined, or mixed withone another to constitute another embodiment without departing from thespirit of the present disclosure.

Referring to FIG. 1, FIG. 1 schematically illustrates a top view of anelectronic device according to a first embodiment of the presentdisclosure. The electronic device of the present disclosure may forexample include a display device, a light emitting device, a sensingdevice, a touch display device, a curved display device or a free shapedisplay device, but not limited thereto. The electronic device may be afoldable electronic device or a flexible electronic device. Theelectronic device may for example include light emitting diode,fluorescence, phosphor, other suitable display mediums or thecombinations of the above-mentioned materials, but not limited thereto.The light emitting diode may for example include organic light emittingdiode (OLED), mini light emitting diode (mini LED), micro light emittingdiode (micro LED), quantum dot light emitting diode (QLED or QDLED),other suitable materials or the combinations of the above-mentionedmaterials, but not limited thereto. The display device may for exampleinclude tiled display device, but not limited thereto. It should benoted that the electronic device may be the combinations of theabove-mentioned devices, but not limited thereto. In addition, theappearance of the electronic device may be rectangular, circular,polygonal, a shape with curved edges or other suitable shapes. Theelectronic device may include peripheral systems such as driving system,control system, light source system and shelf system to support thedisplay device or the tiled display device. It should be noted that theelectronic device may be the combinations of the above-mentioneddevices, but not limited thereto.

According to the present embodiment, the electronic device shown in FIG.1 may include a display device 100, which may display static or dynamicimages according to the demands and operations of users, but not limitedthereto. The display device 100 may for example include notebook, commondisplay, tiled display, vehicle display, touch display, television,surveillance camera, smart phone, tablet, light source module, lightingequipment or electronic devices applied to the above-mentioned products,but not limited thereto. In order to simplify the description, thedisplay device is taken as an example of the electronic device fordescription in the following embodiments and variant embodiments, butthe present disclosure is not limited thereto. As shown in FIG. 1, thedisplay device 100 includes a display panel DP, and the display panel DPmay include a display region DR and a non-display region PR, wherein thedisplay region DR may be the region of the display device 100 fordisplaying the images, and the non-display region PR is the region ofthe display device 100 outside the display region DR, which may forexample be called as the peripheral region. The non-display region PRmay for example be used to dispose peripheral wires and/or peripheralcircuits such as driving elements or wires, but not limited thereto. Insome embodiments, the display panel DP may include the display region DPonly. In the present embodiment, the display region DR may be defined bya plurality of pixels (or sub-pixels, which will be called as a pixel inthe following) of the display device 100. In detail, the display regionDR of the present embodiment may for example be a pixel region PXR,wherein the pixel region PXR may include a plurality of pixels orsub-pixels to display images, but not limited thereto. It should benoted that the pixels in the pixel region PXR may for example includepixels of a single color or pixels of a plurality of colors, but notlimited thereto. For example, the pixel region PXR may include thepixels generating one of red lights, blue lights, green lights or lightsof other suitable colors in some embodiments, or the pixel region PXRmay include the pixels generating red lights, blue lights and greenlights in some embodiments, but not limited thereto. The definition ofthe pixels in the pixel region PXR mentioned above may be applied toeach of the embodiments and variant embodiments of the presentdisclosure, and will not be redundantly described in the following.

Referring to FIG. 2 as well as FIG. 1, FIG. 2 schematically illustratesa cross-sectional view of the electronic device according to the firstembodiment of the present disclosure. In order to simplify the figure,the portion of the display device 100 in the non-display region PR isnot shown in FIG. 2, but not limited thereto. As shown in FIG. 2, thedisplay panel DP of the display device 100 may be the display panelmentioned in each of the embodiments and variant embodiments of thepresent disclosure, and will not be redundantly described in thefollowing. The display panel DP may include a substrate SB, a drivinglayer DL, light emitting elements LM and an insulating layer EN. Thesubstrate SB may for example be a flexible substrate or a non-flexiblesubstrate. The material of the substrate SB may for example includeglass, ceramic, quartz, sapphire, acrylic, polyimide (PI), polyethyleneterephthalate (PET), polycarbonate (PC), polyethersulfone (PES),polybutylene terephthalate (PBT), polyethylene naphthalate (PEN),polyarylate (PAR), other suitable materials or the combinations of theabove-mentioned materials, but not limited thereto. The driving layer DLis disposed on the substrate SB, wherein the driving layer DL mayinclude at least one driving element, and the driving element may forexample include a thin film transistor, other suitable driving elementsor the combinations of the above-mentioned elements. The thin filmtransistor may for example be a top-gate thin film transistor, abottom-gate thin film transistor, a dual-gate thin film transistor or amulti-gate thin film transistor, but not limited thereto. The lightemitting elements LM are disposed on the driving layer DL and areelectrically connected to the corresponding driving element of thedriving layer DL, such that the driving element may drive the lightemitting elements LM to emit lights and display images, but not limitedthereto. In some embodiments, the light emitting elements LM may bedisposed on the substrate SB, and the driving signal may be provided byan external circuit board to drive the light emitting elements LM toemit lights and display images. According to the present embodiment, thelight emitting elements LM may for example include organic lightemitting diode (OLED), quantum dot light emitting diode (QLED or QDLED),light emitting diode (LED), mini light emitting diode (mini LED), microlight emitting diode (micro LED), other types of light emitting diode orthe combinations of the above-mentioned light emitting diodes, but notlimited thereto. For example, the light emitting elements LM of thepresent embodiment may be light emitting diode elements, and each of thelight emitting elements LM may for example include a top electrode, abottom electrode and a light emitting layer disposed between the topelectrode and the bottom electrode (not shown in figures), but notlimited thereto. In some embodiments, each of the light emittingelements LM may be disposed on two different electrodes, and the twodifferent electrodes may for example be the electrodes with differentcurrent flow. In detail, the light emitting element LM may be disposedon an anode and a cathode, wherein the current of the anode flows to thelight emitting element LM, and the current of the cathode flows out ofthe light emitting element LM, but not limited thereto. The insulatinglayer EN may be disposed on the light emitting elements LM to protectthe light emitting elements LM, wherein the insulating layer EN mayinclude any suitable insulating material. In some embodiments, theinsulating layer EN may be an encapsulation layer, and the insulatinglayer EN may be disposed on the light emitting elements LM and cover thelight emitting elements LM and the layers thereunder. In addition to theabove-mentioned elements or layers, the display panel DP may optionallyinclude a touch layer TL, a polarizer PL and a cover layer CO. The touchlayer TL is disposed on the encapsulation layer (insulating layer EN),and the touch layer TL may for example include touch elements such astouch electrodes and wires, but not limited thereto. In someembodiments, the touch layer TL may be disposed on the light emittingelements LM or the top electrodes of the light emitting elements LM. Thepolarizer PL may be disposed on the touch layer TL, and the polarizermay for example provide optical functions such as polarization. Thecover layer CO may be disposed on the polarizer PL to protect theelements and layers of the display panel DP, wherein the cover layer COmay include cover glass, other suitable covering materials or thecombinations of the above-mentioned materials, but not limited thereto.It should be noted that the disposition of the elements or the layers ofthe display panel DP of the present embodiment is not limited to what isshown in FIG. 2, and the disposition order of the elements or the layersmay be adjusted according to the demands. In addition, the display panelDP may further include other suitable elements or layers in someembodiments, and the present disclosure is not limited thereto.

According to the present embodiment, the display device 100 may furtherinclude an optical sensing module LSM in addition to the display panelDP. For example, as shown in FIG. 1 and FIG. 2, the display region DR(or the pixel region PXR) of the display panel DP of the display device100 may include a first area A1 and a second area A2, wherein theoptical sensing module LSM may be disposed on a bottom surface 102 ofthe substrate SB corresponding to the second area A2. In someembodiments, the optical sensing module LSM is disposed corresponding tothe second area A2, and at least a portion of the optical sensing moduleLSM is disposed on the bottom surface 102 of the substrate SB. Theoptical sensing module LSM may for example include optical sensor,optical distance sensor, optical fingerprint sensor or other suitableoptical sensing elements, but not limited thereto. It should be notedthat although the second area A2 is rectangular in FIG. 1, the presentdisclosure is not limited thereto. In some embodiments, the second areaA2 may be circular, oval-shaped, non-regular or other suitable shapesaccording to the demands of the design. The definitions and otherfeatures of the first area A1 and the second area A2 will be detailed inthe following.

Referring to FIG. 3 as well as FIG. 2, FIG. 3 schematically illustratesthe distribution of pixels of the electronic device according to thefirst embodiment of the present disclosure. In order to simplify thefigure, FIG. 3 only shows the distribution of the pixels in a portion ofthe pixel region PXR, and other elements or layers may be referred to inFIG. 2 and are omitted, but not limited thereto. In addition, in theembodiment shown in FIG. 3, the condition that the pixel region PXRincludes the pixels emitting lights of a single color is taken as anexample, but the present disclosure is not limited thereto. According tothe present embodiment, the pixel region PXR of the display panel DP mayinclude the pixels with different designs. In detail, as shown in FIG.3, the pixel region PXR may include pixels PX1 and pixels PX2 in thepresent embodiment, wherein the pixels PX1 and the pixels PX2 may be thepixels of the display panel DP having display function, but not limitedthereto. It should be noted that the “pixel” mentioned above may forexample formed of each of the light emitting element LM shown in FIG. 2and the driving elements and/or other layers corresponding to the lightemitting element LM. That is, a pixel may for example include a lightemitting element LM and the driving elements and/or other layerscorresponding to the light emitting element LM, but not limited thereto.The definition of the pixel mentioned in the present embodiment may beapplied to each of the embodiments and variant embodiments of thepresent disclosure, and will not be redundantly described in thefollowing. According to the present embodiment, the size of the pixelPX1 may be different from the size of the pixel PX2. In detail, the sizeof the pixel PX1 may be greater than the size of the pixel PX2, and thedensity of the pixel PX1 may be the same as the density of the pixelPX2, but not limited thereto. It should be noted that “the size of thepixel PX1 is greater than the size of the pixel PX2” mentioned abovemeans that the area of the substrate SB covered by the pixel PX1 isgreater than the area of the substrate SB covered by the pixel PX2, or,when the length of the pixel PX1 is greater than the length of the pixelPX2 in a first direction D1 and/or a second direction D2, the size ofthe pixel PX1 may also be regarded to be greater than the size of thepixel PX2, wherein the areas of the pixel PX1 and the pixel PX2 may forexample be the areas of the light emitting layers (not shown in figure)of the light emitting elements LM of the pixel PX1 and the pixel PX2respectively, and the lengths of the pixel PX1 and the pixel PX2 in thesame direction may for example be the lengths of the light emittinglayers (not shown in figure) of the light emitting elements LM of thepixel PX1 and the pixel PX2 respectively, but not limited thereto. Inaddition, the density of the pixel PX1 and the density of the pixel PX2mentioned above may represent the number of the pixels PX1 in a unitarea and the number of the pixels PX2 in a unit area respectively. Indetail, since it can be seen from FIG. 3 that the number (ordistribution density) of the pixels PX1 in a unit area and the number ofthe pixels PX2 in a unit area are substantially the same, the pixels PX1and the pixels PX2 may be regarded to have substantially the samedensity in the present embodiment, but not limited thereto. The firstdirection D1 and the second direction D2 mentioned above may for examplebe the arrangement direction of the pixels PX1 and the pixels PX2 in thepresent embodiment, but not limited thereto. In some embodiments, whenthe pixels PX1 and the pixels PX2 are arranged along the lateraldirection and the longitudinal direction, the first direction D1 (suchas the lateral direction, but not limited thereto) and the seconddirection D2 (such as the longitudinal direction, but not limitedthereto) may be perpendicular to each other, or, according to thearrangement of the pixels PX1 and the pixels PX2, the first direction D1and the second direction D2 may not be perpendicular to each other insome embodiments, but not limited thereto. The definitions of the area,the length and the arrangement direction of the pixel mentioned abovemay be applied to each of the embodiments and variant embodiments of thepresent disclosure, and will not be redundantly described in thefollowing. Because the pixels PX1 and the pixels PX2 include the samedensity and different sizes in the present embodiment, the regionenclosed by the connections of the midpoints of the line segmentsconnecting the center points of the outermost pixels PX2 and the centerpoints of the pixels PX1 located at the periphery of the outermostpixels PX2 but adjacent to the outermost pixels PX2 may be defined asthe second area A2 of the pixel region PXR after the pixels PX2 aredefined through the size characteristic, and the region of the pixelregion PXR other than the second area A2 may be defined as the firstarea A1, but not limited thereto. In detail, as shown in FIG. 3, becausethe pixels PX2 and the pixels PX1 have different sizes in the presentembodiment, the pixels may be defined to be the pixel PX1 or the pixelPX2 through the size of the appearance of the pixels, and after all ofthe pixels are defined, all of the pixels PX2 may be determined, and theoutermost portion of the pixels PX2 (such as the pixels PX2 in thering-shaped portion P1 shown in FIG. 3) may be founded. After that, themidpoint of the line segment connecting the center point of each of theoutermost pixels PX2 and the center point of the pixel PX1 adjacent tothat outermost pixel PX2 may be defined, and the region enclosed by theconnections of the defined midpoints may be defined as the second areaA2. It should be noted that the center point of the pixel may be thecenter of the outline or the shape of the pixel, for example, when theoutline of the pixel is circular or oval-shaped, the center point of thepixel may be the center of the circle or oval, or, when the outline ofthe pixel is triangular, rectangular or polygonal, the center point ofthe pixel may be the geometry center of the shape, or, when the outlineor the shape of the pixel is irregular, the center point may be thecenter of the circle in which the circle is drawn by using the linesegment connecting the two farthest points of the irregular shape as thediameter. For example, as shown in FIG. 3, one of the outermost pixelsPX2 may have a center point C1, and the pixels PX1 (such as the pixelPX11, the pixel PX12 and the pixel PX13) adjacent to that outermostpixel PX2 may have a center point C2, a center point C3 and a centerpoint C4 respectively, wherein the line segment connecting the centerpoint C1 and the center point C2 may have a midpoint C5, the linesegment connecting the center point C1 and the center point C3 may havea midpoint C6, and the line segment connecting the center point C1 andthe center point C4 may have a midpoint C7. After other midpoints aredefined through the above-mentioned methods, the region enclosed by theconnections of the midpoint C5, the midpoint C6, the midpoint C7 andother midpoints may be defined as the second area A2, as shown in FIG.3, but not limited thereto. The first area A1 and the second area A2 ofthe pixel region PXR may be defined through the above-mentioned method,wherein the pixels in the first area A1 are regarded as the pixels PX1,and the pixels in the second area A2 are regarded as the pixels PX2.According to the present disclosure, the transmittance of the secondarea A2 may be greater than the transmittance of the first area A1, andbecause some of the structures of the pixel may affect thetransmittance, the pixels PX2 in the second area A2 may be designed tohave a smaller size comparing to the pixels PX1 in the first area A1 inthe present embodiment, such that the transmittance of the second areaA2 is greater than the transmittance of the first area A1 can beachieved. The measurement of the transmittance mentioned above may forexample be respectively performed on the portion P2 of the first area A1and the portion P3 of the second area A2 by using a probe having a sizeof 1 millimeter (mm)*1 mm, 2 mm*2 mm, 5 mm*5 mm or 20 mm*20 mm, but notlimited thereto. The “transmittance” mentioned in the present disclosureis the percentage of the light intensity measured after the light sourcepenetrates the pixel region PXR divided by the light intensity measuredwhen the light source does not penetrate the pixel region PXR. The lightintensity mentioned in the present disclosure is the integral value ofthe spectrum of the light source (the light source may for exampleinclude displaying light or ambient light), and the light source may forexample include visible light (for example, the light with a wavelengthranges from 380 nanometers (nm) to 780 nm) or infrared light (forexample, the light with a wavelength ranges from 780 nm to 1000000 nm),but not limited thereto. For example, when the light source includesvisible light, the light intensity may be the integral value of thespectrum from 380 nm to 780 nm, and the transmittance of the pixelregion PXR is the percentage of the integral value of the spectrum ofthe visible light measured after the light source penetrates the pixelregion PXR divided by the integral value of the spectrum of the visiblelight measured when the light source does not penetrate the pixel regionPXR. It should be noted that the light source should penetrate the pixelregion PXR in order to measure the transmittance of the pixel regionPXR, for example, the transmittance from the substrate SB to theinsulating layer EN may be measured, the transmittance from thesubstrate SB to the polarizer PL may be measured, transmittance from thesubstrate SB to the touch layer TL may be measured or transmittance fromthe substrate SB to the cover layer CO may be measured, but not limitedthereto. In addition, the comparison of the transmittance of the firstarea A1 and the second area A2 may also be performed through an opticalmicroscope in addition to comparing the transmittance of the first areaA1 and the transmittance of the second area A2 by measuring thetransmittances through the equipment having transmittance measurementfunction. When the light source of the optical microscope penetrates thepixel region PXR, if the transmittance of the second area A2 is greaterthan the transmittance of the first area A1, the luminous flux of thesecond area A2 may be greater than the luminous flux of the first areaA1, and the brightness of the second area A2 may be greater than thebrightness of the first area A1. Therefore, when the pixel region PXR isdisplayed on a photo or an image, the gray level of the second area A2may be greater than the gray level of the first area A1. It should benoted that the measurement of the transmittance of the first area A1 andthe transmittance of the second area A2 should be performed on similarstacks of layers and in the same way. For example, if the transmittanceof the first area A1 is observed from the substrate SB to the coverlayer CO by the optical microscope, the transmittance of the second areaA2 should also be observed from the substrate SB to the cover layer COby the optical microscope with the same light source, thereby comparingthe transmittance of the first area A1 and the transmittance of thesecond area A2. The measurement of the transmittance of the embodimentsor variant embodiments in the following may be referred to in thepresent embodiment, and will not be redundantly described in thefollowing. As mentioned above, the display device 100 may include theoptical sensing module LSM (as shown in FIG. 2) disposed on the bottomsurface 102 of the substrate SB and corresponding to the second area A2.Because the transmittance of the second area A2 may be greater than thetransmittance of the first area A1 in the present embodiment, when theoptical sensing module LSM is disposed corresponding to the second areaA2, the light receiving effect of the optical sensing module LSM throughthe second area A2 may be improved, and the sensing effect of theoptical sensing module LSM may thereby be improved.

It should be noted that the second area A2 mentioned above may becomposed of the pixels of a single color or the pixels of a plurality ofcolors. In detail, as mentioned above, the pixel region PXR of thepresent embodiment may include the pixels emitting lights of a singlecolor or the pixels emitting lights of a plurality of colors, whereinthe definition of the second area A2 is described in the above-mentionedcontents and in FIG. 3 when the pixel region PXR includes the pixelsemitting lights of a single color, and will not be redundantlydescribed. When the pixel region PXR includes the pixels emitting lightsof a plurality of colors, a region can be defined by the above-mentionedmethod in each type of the pixels, and the second area A2 may be formedof the defined regions. For example, the pixel region PXR may forexample include red pixels, green pixels and blue pixels in someembodiments, and in order to define the range of the second area A2, thered pixels in the pixel region PXR may for example be determined, andthe pixels PX1 and the pixels PX2 of the red pixels may be definedaccording to the above-mentioned method, thereby defining the secondarea of the red pixels. After that, the second area of the blue pixelsand the second area of the green pixels are defined in the same way, andthe second area A2 of the pixel area A2 may for example be the union(union area) of the second area of the red pixels, the second area ofthe blue pixels and the second area of the green pixels, or in otherwords, the second area A2 of the pixel region PXR may cover at least oneof the second area of the red pixels, the second area of the blue pixelsand the second area of the green pixels, but not limited thereto. Itshould be noted that the definition of the second area A2 of the presentembodiment is not limited to the above-mentioned contents, and thesecond area A2 may be defined in different ways according to the designof the product. The above-mentioned defining method of the second areaA2 when the pixel region PXR includes the pixels emitting lights of aplurality of colors may be applied to each of the embodiments andvariant embodiments of the present disclosure, and will not beredundantly described in the following.

According to the present embodiment, after the second area A2 of thepixel region PXR is defined, the width of the second area A2 may bedefined. In detail, as shown in FIG. 3, the second area A2 may have acoverage CR on the substrate SB, wherein the coverage CR may have awidth W1 in the first direction D1. It should be noted that although thecoverage CR of the second area A2 is a rectangle in FIG. 3, the presentembodiment is not limited thereto. As mentioned above, the second areaA2 may have different shapes due to different types of the pixels and/ordifferent definitions of the pixels. Therefore, the coverage CR of thesecond area A2 may have any suitable shape. When the coverage CR of thesecond area A2 is non-rectangular (such as circular or irregular), thewidth W1 may for example be defined as the maximum width of the coverageCR in the first direction D1, but not limited thereto.

Referring to FIG. 4 as well as FIG. 2, FIG. 4 schematically illustratesthe distribution of pixels of an electronic device according to avariant embodiment of the first embodiment of the present disclosure. Inorder to simplify the figure, FIG. 4 only shows the distribution of thepixels of the pixel region PXR, and other elements or layers are omittedand may be referred to in FIG. 2, but not limited thereto. In addition,in the present variant embodiment shown in FIG. 4, the pixel region PXRincludes the pixels emitting lights of a single color is taken as anexample for description, but the present disclosure is not limitedthereto. One of the main differences between the display panel shown inFIG. 4 and the display panel shown in FIG. 3 is the distribution of thepixels. As shown in FIG. 4, the pixel region PXR may include the pixelsPX1 and the pixels PX2 in the present variant embodiment, wherein thesize of the pixels PX1 and the size of the pixels PX2 are the same, butthe density of the pixels PX2 may be less than the density of the pixelsPX1, but not limited thereto. The definition of the size of the pixeland the density of the pixel may be referred to in the above-mentionedembodiments, and will not be redundantly described here. According tothe present variant embodiment, because the pixels PX1 and the pixelsPX2 have the same size and different densities, the region enclosed bythe connections of the center points (such as the center point C1) ofthe outermost pixels PX2 along the arrangement directions of the pixelsmay be defined as the second area A2 after the pixels PX2 are definedthrough the density characteristic, and the region of the pixel regionPXR other than the second area A2 may be defined as the first area A1,but not limited thereto. In some embodiments, the difference in thedensity characteristic may represent that the number of the pixels in arow (the first direction D1) is different from the number of the pixelsin another row, or the number of the pixels in a column (the seconddirection D2) is different from the number of the pixels in anothercolumn under a constant length or width. For example, as shown in FIG.4, six pixels are included in the second column from the left (that is,the column where the pixel PX14 is located), three pixels are includedin the third column from the left (that is, the column where the pixelPX28 is located), and the density characteristic of the two columnsmentioned above may be regarded to be different. In detail, as shown inFIG. 4, because the density of the pixels PX2 is lower, a greaterspacing (such as the spacing L1 and the spacing L1′ shown in FIG. 4) maybe included between adjacent pixels PX2. In addition, because the pixelsPX1 have relatively greater density, a lower spacing (such as thespacing L2 and the spacing L2′ shown in FIG. 4) may be included betweenadjacent pixels PX1. According to the present variant embodiment, whenthe pixel to be defined and the pixels adjacent to the pixel to bedefined include at least one spacing L1′ in the first direction D1 andat least one spacing L1 in the second direction D2 respectively, thepixel to be defined may be defined as the pixel PX2, and the otherpixels may be defined as the pixels PX1. For example, as shown in FIG.4, the pixel PX21 and the two pixels adjacent to the pixel PX21 in thefirst direction D1 (the pixel PX14 and the pixel PX22) may all have thespacing L1′, and the pixel PX21 and the pixel adjacent to the pixel PX21in the second direction D2 (the pixel PX29) may have the spacing L1.Because the pixel PX21 and the pixels adjacent to the pixel PX21 includeat least one spacing L1′ in the first direction D1 and at least onespacing L1 in the second direction D2 respectively, the pixel PX21 maybe defined as the pixel PX2 in the present variant embodiment. Thespacing between the pixel PX22 and the pixel PX21 is the spacing L1′,and the spacing between the pixel PX22 and the pixel PX17 is the spacingL2′ in the first direction D1. In addition, the spacing between thepixel PX22 and the pixel adjacent to the pixel PX22 (the pixel PX23) isthe spacing L1. Therefore, because the pixel PX22 and the pixelsadjacent to the pixel PX22 include at least one spacing L1′ in the firstdirection D1 and at least one spacing L1 in the second direction D2respectively, the pixel PX22 may be defined as the pixel PX2 in thepresent variant embodiment. In another aspect, as shown in FIG. 4, thespacing between the pixel PX14 and the pixel PX21 in the first directionD1 is the spacing L1′, and the spacing between the pixel PX14 and thepixel PX15 in the first direction D1 is the spacing L2′. In addition,the spacing between the pixel PX14 and the pixel PX16 in the seconddirection D2 is the spacing L2. Therefore, because the pixel PX14 andthe pixels adjacent to the pixel PX14 only include the spacing L1′ inthe first direction, the pixel PX14 may be defined as the pixel PX1 inthe present variant embodiment. The definitions of the first directionD1 and the second direction D2 may be referred to in the above-mentionedcontents, and will not be redundantly described here. It should be notedthat the first direction D1 and the second direction D2 shown in FIG. 4are the lateral direction and the longitudinal direction respectively isonly an example, and the first direction and the second direction may beany suitable direction in some embodiments according to the arrangementcondition of the pixels. The pixels in the pixel region PXR may bedivided into the pixels PX1 and the pixels PX2 through theabove-mentioned method, and after the type of the pixels is defined, theregion enclosed by the connections of the center points (such as thecenter point C1) of the outermost pixels PX2 in the arrangementdirection (such as the first direction D1 and the second direction D2)of the pixels can be defined as the second area A2. In detail, as shownin FIG. 4, the outermost pixels PX2 shown in FIG. 4 may be the pixel PX2l to the pixel PX28, wherein the center point of the pixel PX2 l and thecenter point of the pixel PX22 may include a connection E1 in the firstdirection D1, the center point of the pixel PX22, the center point ofthe pixel PX23 and the center point of the pixel PX24 may include aconnection E2 in the second direction D2, the center point of the pixelPX25 and the center point of the pixel PX26 may include a connection E3in the first direction D1, the center point of the pixel PX26, thecenter point of the pixel PX27 and the center point of the pixel PX28may include a connection E4 in the second direction D2, and the regionenclosed by the connection E1, the connection E2, the connection E3 andthe connection E4 may be defined as the second area A2 in the presentvariant embodiment, but not limited thereto. Similarly, although thepixel region PXR shown in FIG. 4 includes the pixels emitting lights ofa single color, the present disclosure is not limited thereto. In someembodiments, the pixel region PXR may include the pixels emitting lightsof a plurality of colors, and the definition of the second area A2 ofthe pixel region PXR under this condition may be referred to in thedefining methods of the present variant embodiment and theabove-mentioned embodiment. That is, the second area of the pixels ofeach of the colors may be defined respectively, and the union region ofthe defined second areas of the pixels of each of the colors may bedefined, which will not be redundantly described here. The first area A1and the second area A2 of the pixel region PXR may be defined throughthe above-mentioned methods, wherein the pixels in the first area A1 maybe the pixels PX1, and the pixels in the second area A2 may be thepixels PX2. According to the present disclosure, the transmittance ofthe second area A2 may be greater than the transmittance of the firstarea A1, and because some of the structures of the pixel may affect thetransmittance, the pixels PX2 in the second area A2 may be designed tohave a lower density comparing to the pixels PX1 in the first area A1 inthe present embodiment, such that the transmittance of the second areaA2 is greater than the transmittance of the first area A1 can beachieved. The measurement of the transmittance of the present variantembodiment may refer to the above-mentioned embodiment, and will not beredundantly described here. As mentioned above, the display device 100may include the optical sensing module LSM (as shown in FIG. 2) disposedon the bottom surface 102 of the substrate SB and corresponding to thesecond area A2. Because the transmittance of the second area A2 may begreater than the transmittance of the first area A1 in the presentembodiment, when the optical sensing module LSM is disposedcorresponding to the second area A2, the light receiving effect of theoptical sensing module LSM through the second area A2 may be improved,and the sensing effect of the optical sensing module LSM may thereby beimproved.

According to the present variant embodiment, after the first area A1 andthe second area A2 of the pixel region PXR are defined, the width of thesecond area A2 may be defined. In detail, as shown in FIG. 4, the secondarea A2 may have a coverage CR on the substrate SB, wherein the coverageCR may have a width W1 in the first direction D1, but not limitedthereto. In some embodiments, when the coverage CR of the second area A2includes irregular shapes due to different types of the pixels and/ordifferent definitions of the pixels, the width of the coverage CR mayfor example be defined as the maximum width of the coverage CR in thefirst direction D1, but not limited thereto.

Referring to FIG. 5 and FIG. 6, FIG. 5 schematically illustrates thedistribution of pixels of an electronic device according to anothervariant embodiment of the first embodiment of the present disclosure,and FIG. 6 schematically illustrates the distribution of pixels of anelectronic device according to yet another variant embodiment of thefirst embodiment of the present disclosure. In order to simplify thefigures, FIG. 5 and FIG. 6 only show the distribution of the pixels ofthe display panel DP, and other elements or layers are omitted and mayrefer to FIG. 2, but not limited thereto. In addition, FIG. 5 and FIG. 6show the condition that the display panel DP includes the pixelsemitting lights of a single color, but the present disclosure is notlimited thereto. One of the main differences between the display panelsshown in FIG. 5 and FIG. 6 and the display panel shown in FIG. 3 is thedistribution of the pixels. As shown in FIG. 5, the pixel region PXR mayinclude the pixels PX1 and the pixels PX2, wherein the size and thedensity of the pixels PX2 are less than the size and the density of thepixels PX1. Because the size and the density of the pixels PX2 aredifferent from the size and the density of the pixels PX1, the type ofeach of the pixels may be defined through the size characteristic and/orthe density characteristic, wherein the defining method may be referredto in the above-mentioned embodiment and variant embodiment, and willnot be redundantly described here. After the pixels PX1 and the pixelsPX2 are defined, the method described in the above-mentioned variantembodiment shown in FIG. 4 may be used to define the first area A1including the pixels PX1 and the second area A2 including the pixelsPX2, wherein the defined second area A2 may have a coverage CR, and thecoverage CR may have a width W1 in the first direction D1, but notlimited thereto. In some embodiments, as shown in FIG. 6, after thepixels PX1 and the pixels PX2 are defined, when two adjacent pixels donot belong to the same type of the pixels, for example, when one of theadjacent two of the pixels is the pixel PX1 (such as the pixel PX14),and another one of the adjacent two of the pixels is the pixel PX2 (suchas the pixel PX21), the connections of the center points of theoutermost pixels PX2 may serve as the edges of the second area A2′. The“outermost” pixels PX2 may be the pixels PX2 in the uppermost row or thelowermost row in the second direction D2 and the pixels PX2 in theleftmost column or the rightmost column in the first direction D1. Forexample, the pixel PX2 l is the outermost pixel PX2 (because the pixelPX2 l is in the uppermost row in the second direction). The edges of thesecond area A2′ are formed of the connections of the center points ofthe outermost pixels PX2. The second area A2′ includes the pixels PX2,and the first area A1′ includes the pixels PX1, wherein the second areaA2′ has a coverage CR′, and the coverage CR′ has a maximum width W1 inthe first direction D1, but not limited thereto. In some embodiments,the pixel region PXR may include the pixels emitting lights of aplurality of colors, and the definition of the second area A2 (or thesecond area A2′) of the pixel region PXR under this condition may referto the defining methods of the present variant embodiment and theabove-mentioned embodiment. That is, the second area of the pixels ofeach of the colors may be defined respectively, and the union region ofthe defined second areas of the pixels of each of the colors may bedefined, which will not be redundantly described here. According to thepresent variant embodiment, because the size and the density of thepixels PX2 in the second area A2 (or the second area A2′) are less thanthe size and the density of the pixels PX1 in the first area A1 (or thefirst area A1′), the transmittance of the second area A2 (or the secondarea A2′) may be greater than the transmittance of the first area A1 (orthe second area A1′). The measurement of the transmittance may bereferred to in the above-mentioned embodiment, and will not beredundantly described here. In addition, as mentioned above, the displaydevice 100 may include the optical sensing module LSM (as shown in FIG.2) disposed on the bottom surface 102 of the substrate SB andcorresponding to the second area A2 (or the second area A2′). Becausethe transmittance of the second area A2 (or the second area A2′) may begreater than the transmittance of the first area A1 (or the first areaA1′) in the present embodiment, when the optical sensing module LSM isdisposed corresponding to the second area A2 (or the second area A2′),the light receiving effect of the optical sensing module LSM through thesecond area A2 (or the second area A2′) may be improved, and the sensingeffect of the optical sensing module LSM may thereby be improved.

Referring to FIG. 7, FIG. 7 schematically illustrates the distributionof pixels of an electronic device according to a second embodiment ofthe present disclosure. In order to simplify the figure, FIG. 7 onlyshows the distribution of the pixels of the display panel DP, and otherelements or layers are omitted and may refer to FIG. 2, but not limitedthereto. In addition, FIG. 7 show the condition that the display panelDP includes the pixels emitting lights of a single color, but thepresent disclosure is not limited thereto. One of the main differencesbetween the display panel shown in FIG. 7 and the display panel shown inFIG. 3 is the design of the pixels. According to the present embodiment,the display panel DP may not include the pixel PX2 mentioned in theabove-mentioned embodiments and variant embodiments. However, thedisplay panel DP may further include adjusting pixels disposed in thepixel region PXR. In detail, as shown in FIG. 7, the pixel region PXR ofthe display panel DP of the present embodiment may include the pixelsPX1 and the adjusting pixels PX3, but not limited thereto. The pixelsPX1 of the present embodiment may be similar to or the same as thepixels PX1 of the above-mentioned embodiments and variant embodiments,and will not be redundantly described here. According to the presentembodiment, the adjusting pixels PX3 may be disposed in the pixel regionPXR, for example, the adjusting pixels PX3 shown in FIG. 7 may bedisposed staggered with the pixels PX1, and the adjusting pixels PX3 arenot overlapped with the pixels PX1 in the first direction D1 and thesecond direction D2 (that is, the arrangement direction of the pixels),but not limited thereto. In some embodiments, the disposition positionof the adjusting pixels PX3 may be adjusted according to the demands ofthe design as long as the adjusting pixels PX3 are not overlapped withthe pixels PX1 in a third direction D3 perpendicular to the displaysurface of the display panel DP (such as the normal direction of thedisplay surface of the display panel DP, but not limited thereto). Inaddition, as shown in FIG. 7, the density of the adjusting pixels PX3and the density of the pixels PX1 may be the same, and the size of theadjusting pixels PX3 may be less than the size of the pixels PX1, butnot limited thereto. In some embodiments, according to the demands ofthe design, the density and the size of the adjusting pixels PX3 may begreater than, equal to or less than the density and the size of thepixels PX1. According to the present embodiment, the adjusting pixelsPX3 may be used to adjust the transmittance of the pixel region PXR,wherein the adjusting pixels PX3 may for example be achieved bydisposing a liquid crystal layer in the display device (such as thedisplay device 100 shown in FIG. 1 and FIG. 2). In detail, the liquidcrystal layer and the driving elements of the liquid crystal layer maybe disposed at any suitable position of the display device, such thateach of the adjusting pixels PX3 may correspond to a single liquidcrystal unit, but not limited thereto. In some embodiments, theadjusting pixels PX3 may be formed by the design of the substrate of thedisplay device. For example, the patterned holes or recesses may beformed on the bottom surface 102 of the substrate SB of the displaydevice 100 shown in FIG. 2, wherein the position of the holes or therecesses may for example correspond to the position of the adjustingpixels PX3, but not limited thereto. It should be noted that theadjusting pixels PX3 formed through the above-mentioned methods mayincrease the transmittance of the display panel DP. For example, whenthe adjusting pixels PX3 are formed by disposing the liquid crystallayer and the driving elements, because the adjusting pixels PX3 maycorrespond to the liquid crystal units in the liquid crystal layer, thetransmittance of a portion of the pixel region PXR including theadjusting pixels PX3 may be improved by the increasing light penetrationdue to turning of the liquid crystal units driven by the drivingelements. Or, when the adjusting pixels PX3 are formed by forming holeson the bottom surface 102 of the substrate SB, because a portion of thesubstrate SB corresponding to the adjusting pixels PX3 has lowerthickness due to the holes or the recesses, the transmittance of theportion of the pixel region PXR including the adjusting pixels PX3 maybe improved by reducing the thickness of the substrate SB, but notlimited thereto. It should be noted that the adjusting pixels PX3 areformed by disposing the liquid crystal layer and/or reducing thethickness of the substrate SB in the present embodiment, therebyadjusting the transmittance. Therefore, compared to the pixels PX1 andthe pixels PX2 mentioned above, the adjusting pixels PX3 of the presentembodiment may not have display function, but not limited thereto.

Referring to FIG. 7 again, the first area A1 and the second area A2 ofthe pixel region PXR may be defined by the positions of the adjustingpixels PX3 and the pixels PX1 in the present embodiment. In detail,after the adjusting pixels PX3 are formed, the positions of all of theadjusting pixels PX3 can be defined. After that, the outermost adjustingpixels PX3 may be determined, and the region enclosed by the connectionsof the center points (such as the center point C2) of the pixels PX1located at the periphery of the outermost adjusting pixels PX3 andadjacent to the outermost adjusting pixels PX3 may be defined as thesecond area A2, and the region of the pixel region PXR other than thesecond area A2 may be defined as the first area A1, wherein thepositions of the adjusting pixels PX3 may for example be determined whenthe adjusting pixels PX3 are formed, but not limited thereto. Forexample, as shown in FIG. 7, after the positions of all of the adjustingpixels PX3 are defined, the outermost adjusting pixels PX3 (such as theadjusting pixels PX3 in the ring-shaped portion P4 shown in FIG. 7) maybe determined, and with respect to each of the outermost adjustingpixels PX3, the pixel PX1 located at the periphery of that adjustingpixel PX3 and adjacent to that adjusting pixel PX3 may be defined. Forexample, as shown in FIG. 7, the pixels PX1 located at the periphery ofthe adjusting pixel PX31 and adjacent to the adjusting pixel PX31include the pixel PX17, the pixel PX18 and the pixel PX19, and thepixels PX1 located at the periphery of the adjusting pixel PX32 andadjacent to the adjusting pixel PX32 include the pixel PX17 and thepixel PX10, but not limited thereto. After all of the pixels PX1 meetthe above-mentioned conditions are determined, the region enclosed bythe connections of the center points (such as the center point C2) ofthese pixels PX1 may be defined as the second area A2 of the pixelregion PXR, and the other region of the pixel region PXR may be definedas the first area A1, but not limited thereto. It should be noted thatthe defining method of the first area A1 and the second area A2 of thepresent embodiment is not limited to the above-mentioned contents, andthe first area A1 and the second area A2 may be defined in differentways according to the demands of the design. The pixel region PXR may bedivided into the first area A1 and the second area A2 through theabove-mentioned method, wherein the second area A2 may include theadjusting pixels PX3. As mentioned above, the display device 100 mayinclude the optical sensing module LSM (as shown in FIG. 2) disposed onthe bottom surface 102 of the substrate SB and corresponding to thesecond area A2. Because the second area A2 may include the adjustingpixels PX3 in the present embodiment to improve the transmittance of thesecond area A2, the light receiving effect of the optical sensing moduleLSM through the second area A2 may be improved, thereby improving thesensing effect of the optical sensing module LSM.

According to the present embodiment, after the first area A1 and thesecond area A2 of the pixel region PXR are defined, the width of thesecond area A2 may be defined. In detail, as shown in FIG. 7, the secondarea A2 may have a coverage CR, wherein the coverage CR may have a widthW1 in the first direction D1, but not limited thereto. In someembodiments, when the coverage CR of the second area A2 includesirregular shapes due to different types of the pixels and/or differentdefinitions of the second area A2, the width of the coverage CR may bedefined as the maximum width of the coverage CR in the first directionD1, but not limited thereto.

Referring to FIG. 8, FIG. 8 schematically illustrates the distributionof pixels of an electronic device according to a variant embodiment ofthe second embodiment of the present disclosure. In order to simplifythe figure, FIG. 8 only shows the distribution of the pixels of thedisplay panel DP, and other elements or layers are omitted and may referto FIG. 2, but not limited thereto. In addition, FIG. 8 show thecondition that the display panel DP includes the pixels emitting lightsof a single color, but the present disclosure is not limited thereto.One of the main differences between the display panel shown in FIG. 8and the display panel shown in FIG. 7 is the distribution of theadjusting pixels. According to the present variant embodiment, as shownin FIG. 8, the adjusting pixels PX3 may be disposed in the pixel regionPXR, wherein the adjusting pixels PX3 may replace a portion of thepixels PX1, such that the adjusting pixels PX3 and the pixels PX1 may bealternately arranged along the first direction D1 and the seconddirection D2 (that is, the arrangement direction of the pixels) in acertain portion (such as the portion P5 shown in FIG. 8) of the pixelregion, but the present disclosure is not limited thereto. The formingmethod of the adjusting pixels PX3 of the present variant embodiment maybe the same as the forming method of the above-mentioned embodiment, andwill not be redundantly described here. Because the dispositionpositions of the adjusting pixels PX3 of the present variant embodimentmay be similar to the disposition positions of the pixels PX2 shown inFIG. 4, the defining method mentioned in the variant embodiment shown inFIG. 4 may be used, that is, the region enclosed by the connections ofthe center points (such as the center point C8) of the outermostadjusting pixels PX3 along the first direction D1 and the seconddirection D2 may be defined as the second area A2, and the region of thepixel region PXR other than the second area A2 may be defined as thefirst area A1, as shown in FIG. 8, but not limited thereto. After thesecond area A2 of the pixel region PXR is defined, the width of thesecond area A2 may be defined. As shown in FIG. 8, the second area A2may have a coverage CR, wherein the coverage CR may have a width W1 inthe first direction D1, but not limited thereto. In some embodiments,when the coverage CR of the second area A2 includes irregular shapes dueto different types of the pixels and/or different definitions of thesecond area A2, the width of the coverage CR may be defined as themaximum width of the coverage CR in the first direction D1, but notlimited thereto. According to the present variant embodiment, becausethe second area A2 may include the adjusting pixels PX3, thetransmittance of the second area A2 may be greater than thetransmittance of the first area A1. In addition, as mentioned above, thedisplay device 100 shown in FIG. 2 may include the optical sensingmodule LSM disposed on the bottom surface 102 of the substrate SB andcorresponding to the second area A2. Because second area A2 can includethe adjusting pixels PX3 to improve the transmittance thereof in thepresent variant embodiment, the light receiving effect of the opticalsensing module LSM through the second area A2 may be improved, and thesensing effect of the optical sensing module LSM may thereby beimproved.

Referring to FIG. 9, FIG. 9 schematically illustrates a cross-sectionalview of an electronic device according to a third embodiment of thepresent disclosure. In order to simplify the figure, the non-displayregion of the display device is omitted in FIG. 9, but the presentdisclosure is not limited thereto. According to the present embodiment,as shown in FIG. 9, the display device 100 may include the display panelDP and the optical sensing module LSM, wherein the display panel DPshown in FIG. 9 and the elements or the layers included in the displaypanel DP may be the same or similar to the display panel DP shown inFIG. 2, and will not be redundantly described here. In the presentembodiment, the optical sensing module LSM may be disposed on thesurface of the substrate SB. In detail, as shown in FIG. 9, the displaydevice 100 of the present embodiment may further include a supportinglayer SUP and an adhesive layer AD. The supporting layer SUP may providethe supporting function in the display device 100, and the supportinglayer SUP may for example include polyethylene terephthalate (PET),other suitable materials or the combinations of the above-mentionedmaterials, but not limited thereto. The adhesive layer AD may includeany suitable adhesive material, and the supporting layer SUP may forexample be adhered to the substrate SB of the display panel DP throughthe adhesive layer AD, but not limited thereto. In the presentembodiment, an aperture OP1 may be formed in the supporting layer SUPand the adhesive layer AD to expose the bottom surface 102 of thesubstrate SB after the supporting layer SUP and the adhesive layer ADare disposed, and the optical sensing module LSM may be disposed in theaperture OP1, such that the optical sensing module LSM may be in contactwith the bottom surface 102 of the substrate SB, thereby finishing thedisposition of the optical sensing module LSM, but not limited thereto.In some embodiments, the optical sensing module LSM may not be incontact with the bottom surface 102 of the substrate SB. It should benoted that the feature mentioned in the present embodiment that thedisplay device 100 includes the supporting layer SUP and the adhesivelayer AD may be applied to each of the embodiments and variantembodiments of the present disclosure, that is, the display devices(such as the display device 100 shown in FIG. 2) of the embodiments andvariant embodiments mentioned above may also include the supportinglayer SUP and the adhesive layer AD, but not limited thereto.

The display device 100 of the present embodiment may further include afunctional layer FL in addition to the above-mentioned elements orlayers, wherein the functional layer FL may for example be disposed onthe bottom surface 103 of the supporting layer SUP, but not limitedthereto. According to the present embodiment, the functional layer FLmay for example include heat dissipation layer, sensing layer (forexample, the sensing board of stylus, but not limited thereto), othersuitable layers or the combinations of the above-mentioned layers. Whenthe display device 100 includes the functional layer FL, the dispositionof the optical sensing module LSM may for example include forming theaperture OP1 in the adhesive layer AD, the supporting layer SUP and thefunctional layer FL and disposing the optical sensing module LSM in theaperture OP1, but not limited thereto. It should be noted that thefeature of the present embodiment that the display device includes thefunctional layer FL may be applied in the display devices (such as thedisplay device 100 shown in FIG. 2) of each of the embodiments andvariant embodiments of the present disclosure.

Referring to FIG. 9 again, as shown in FIG. 9, the optical sensingmodule LSM of the present embodiment may for example be a camera,wherein the optical sensing module LSM may include common elements inthe camera such as the light sensing unit LSU, the lens LEN, theaperture OPE and the like, but not limited thereto. According to thepresent embodiment, the optical sensing module LSM may include anaperture OP2, and because the optical sensing module LSM of the presentembodiment may for example include camera, the aperture OP2 may forexample be defined by the aperture OPE of the optical sensing moduleLSM. For example, according to the design of the aperture OPE (such asthe F-number) of the optical sensing module LSM, the diameter of theaperture OP2 may be different, but not limited thereto. In the presentembodiment, the optical sensing module LSM (camera) may include a fieldof view, and an angle of view may be defined. In detail, as shown inFIG. 9, the coverage of the field of view of the optical sensing moduleLSM may for example be defined by two dotted lines FV shown in FIG. 9(actually, the dotted lines FV may be an enclosed pattern in the topview of the display device, thereby defining the coverage of the fieldof view of the optical sensing module LSM). That is, the region betweenthe two dotted lines FV may for example be the coverage of the field ofview of the optical sensing module LSM, wherein an included angle θ maybe included in the field of view (as shown in FIG. 9) and is defined asthe angle of view of the optical sensing module LSM, but not limitedthereto. According to the aperture OP2 and the field of view of theoptical sensing module LSM, a first portion R1, a second portion R2 anda third portion R3 of the pixel region PXR of the display device 100 ofthe present embodiment may be defined. In detail, as shown in FIG. 9,the first portion R1, the second portion R2 and the third portion R3 ofthe pixel region PXR may be defined based on the bottom surface (thatis, the surface 104 shown in FIG. 9) of the light emitting elements LM,wherein the second portion R2 may correspond to the aperture OP2 of theoptical sensing module LSM, the third portion R3 may include the regionon the surface 104 located within the coverage of the field of viewother than the second portion R2, and the first portion R1 may includethe region of the pixel region PXR other than the second portion R2 andthe third portion R3, but not limited thereto. It should be noted thatthe “bottom surface of the light emitting elements LM” mentioned abovemay for example be the bottom surface of the bottom electrode (such asthe anode) of the light emitting elements LM, but not limited thereto.In some embodiments, the aperture OP2 corresponding to the secondportion R2 may be the aperture corresponding to the minimum F-number ofthe optical sensing module LSM, in other words, the aperture OP2corresponding to second portion R2 may include the maximum aperturesize. According to the present embodiment, because the optical sensingmodule LSM of the display device 100 may be a camera, the second portionR2 corresponding to the aperture OP2 of the optical sensing module LSMmay for example include the region of vertical projection of the lens ofthe camera, and the third portion R3 located within the field of view ofthe optical sensing module LSM may for example be the light receivingregion of the camera in addition to the second portion R2, but notlimited thereto.

According to the present embodiment, the optical sensing module LSM mayreceive the lights through the aperture OP2, such that the lights mayenter the light sensing unit LSU through the lens LEN to form images.For example, as shown in FIG. 9, because the second portion R2 and thethird portion R3 are within the range of the field of view of theoptical sensing module LSM in the present embodiment, the lights passingthrough the second portion R2 and the third portion R3 may enter thelight sensing unit LSU of the optical sensing module LSM through theaperture OP2 of the optical sensing module LSM, but not limited thereto.It should be noted that from the above-mentioned embodiments and variantembodiments (as shown in FIG. 3 to FIG. 8), it can be seen that theoptical sensing module LSM can be disposed corresponding to the secondarea A2 of the pixel region PXR, such that the optical sensing moduleLSM may receive the lights passing through the second area A2, inaddition, because the optical sensing module LSM may be disposedcorresponding to the second portion R2 and the third portion R3 in thepresent embodiment, such that the optical sensing module LSM may receivethe lights passing through the second portion R2 and the third portionR3, the sum of the coverage of the second portion R2 and the coverage ofthe third portion R3 may substantially correspond to the coverage CR ofthe second area A2 mentioned in the above-mentioned embodiments andvariant embodiments. In detail, as shown in FIG. 9, the sum of thecoverage of the second portion R2 and the coverage of the third portionR3 may be the coverage CR of the second area A2 shown in FIG. 3 to FIG.8, and the first portion R1 may substantially correspond to the firstarea A1 shown in FIG. 3 to FIG. 8, but not limited thereto. “The sum ofthe coverage of the second portion R2 and the coverage of the thirdportion R3 may substantially correspond to the coverage CR of the secondarea A2” mentioned above may represent that the sum of the coverage ofthe second portion R2 and the coverage of the third portion R3 maysubstantially be the same as the coverage CR of the second area A2 ofthe above-mentioned embodiments and variant embodiments, and althoughthe sum of the coverage of the second portion R2 and the coverage of thethird portion R3 may be slightly different from the coverage CR due todifferent optical sensing modules LSM, the differences may be ignored.As mentioned above, the sum of the second portion R2 and the thirdportion R3 of the present embodiment may be the same as the second areaA2 of the above-mentioned embodiments and variant embodiments.Therefore, in the following contents of the present embodiment, thesecond portion R2 and the third portion R3 will be combined and calledas the second area A2, wherein the second area A2 of the presentembodiment may be referred to as the second area A2 shown in FIG. 3 toFIG. 8, and will not be redundantly described here. In other words, theoptical sensing module LSM of the display device 100 of the presentembodiment may include the aperture OP2, wherein the aperture OP2 mayreceive the lights passing through the second area A2, but not limitedthereto. In addition, the third portion R3 and the second portion R2 ofthe second area A2 may respectively include a width in the presentembodiment. In detail, as shown in FIG. 9, the second portion R2 mayinclude a width W0 on the surface 104 of the display device 100 in thefirst direction D1, and the third portion R3 may include a width W2 onthe surface 104 of the display device 100 in the first direction D1. Itshould be noted that the second portion R2 may for example be circular,and the third portion R3 may for example be ring-shaped in the presentembodiment, wherein the width W0 mentioned above may be the diameter ofthe second portion R2, and the width W2 mentioned above may be the widthof the ring of the third portion R3, but not limited thereto. Accordingto the above-mentioned embodiments and variant embodiments, the secondarea A2 includes a coverage CR, wherein the coverage CR has a width W1in the first direction D1, and because the second area A2 (including thesecond portion R2 and the third portion R3) of the present embodimentmay be the same as the second area A2 of the above-mentioned embodimentsand variant embodiments, the second area A2 of the present embodimentmay also include a coverage (not shown) having the same width W1 in thefirst direction D1 as the coverage CR of the second area A2 shown inFIG. 3 to FIG. 8. That is, as shown in FIG. 9, the width W1 may be equalto the sum of the width W0 and two times of the width W2 (that is,W1=W0+2*W2), but not limited thereto. The definition of the width W1 ofthe present embodiment may be referred to in the definition of the widthW1 of the above-mentioned embodiments and variant embodiments, and willnot be redundantly described here. It can be known from theabove-mentioned equation that the width (such as the width W0) of theaperture OP2 of the optical sensing module LSM may be less than thewidth (such as the width W1) of the coverage of the second area A2 inthe present embodiment, but not limited thereto. The calculation methodsand the ranges of the width W0 and the width W2 will be detailed in thefollowing. In the present embodiment, the second direction D2 issubstantially perpendicular to the bottom surface 102 of the substrateSB, and the first direction D1 is parallel to the arrangement directionof the light emitting elements LM in the cross-sectional view, but notlimited thereto.

According to the present embodiment, the optical sensing module LSM ofthe display device 100 may for example be a camera. Therefore, thediameter of the aperture OP2 of the optical sensing module LSM may forexample be equal to the diameter of the aperture OPE of the opticalsensing module LSM, but not limited thereto. In addition, as mentionedabove, the second portion R2 of the second area A2 of the presentembodiment may correspond to the aperture OP2 of the optical sensingmodule LSM. Therefore, the width W0 of the second portion R2 may beequal to the size of the aperture OP2. In other words, the width W0 ofthe second portion R2 in the first direction D1 may be determined by thediameter of the aperture OPE of the optical sensing module LSM in thepresent embodiment, wherein the diameter of the aperture of the cameramay be obtained through the formula (1) below.

$\begin{matrix}{{{Diameter}\mspace{14mu}{of}\mspace{14mu}{aperture}} = \frac{{focal}\mspace{14mu}{{length}/{crop}}\mspace{14mu}{factor}}{F - {number}}} & (1)\end{matrix}$

The focal length in the formula (1) mentioned above may be defined asthe distance between the optical center and the light sensing element ofthe camera. For example, the optical center of the camera may be thecenter of one of the lens LEN of the optical sensing module LSM shown inFIG. 9, and the light sensing element may for example be the lightsensing unit LSU of the optical sensing module LSM, but not limitedthereto. In some embodiments, the projection of the optical center onthe width W1 may substantially be located at the midpoint of the widthW1. In addition, according to the present embodiment, the focal lengthof the optical sensing module LSM may range from 10 mm to 45 mm (10mm≤focal length≤45 mm), according to the demands of design of theoptical sensing module LSM, but not limited thereto. The crop factor maybe applied to the elements of the camera to establish the correspondingrelationship of the focal length of different films under the same angleof view, thereby calculating the equivalent focal length of the camera.In the present embodiment, the crop factor may range from 4.55 to 10.81(that is, 4.55≤crop factor ≤10.81), according to the demands of designof the optical sensing module LSM, but not limited thereto. The F-numbermay represent the amount of lights entering the elements of the camera,wherein when the F-number is greater, the diameter of the aperture (suchas the aperture OPE shown in FIG. 9) may be smaller, the amount of thelights entering the optical sensing module LSM may be reduced, and viceversa. According to the present embodiment, the F-number may range from1 to 2.8 (that is, 1≤F-number ≤2.8), according to the demands of designof the optical sensing module LSM, but not limited thereto. After theabove-mentioned values are substituted into the formula (1), thediameter of the aperture OPE shown in FIG. 9 may be calculated, whereinwhen the focal length is 10 mm, the maximum diameter of the aperture maybe 2.20 mm, and the minimum diameter of the aperture may be 0.33 mm;when the focal length is 45 mm, the maximum diameter of the aperture maybe 9.89 mm, and the minimum diameter of the aperture may be 1.49 mm, butnot limited thereto. In addition, because the width W0 of the secondportion R2 in the first direction D1 may be equal to the diameter of theaperture OPE in the present embodiment, the range of the width W0 of thesecond portion R2 may refer to the range of the diameter of the apertureOPE mentioned above. That is, when the focal length is 10 mm, the widthW0 may range from 0.33 mm to 2.20 mm (that is, 0.33 mm≤W0≤2.20 mm), andwhen the focal length is 45 mm, the width W0 may range from 1.49 mm to9.89 mm (that is, 1.49 mm≤W0≤9.89 mm), but not limited thereto. Itshould be noted that the ranges of the values mentioned in the formula(1) are only exemplary, and the present disclosure is not limitedthereto.

According to the present embodiment, as shown in FIG. 9, the width W2 ofthe third portion R3 of the second area A2 of the pixel region PXR inthe first direction D1 may be obtained through the thickness L3 and theincluded angle θ1, wherein the relationship between the width W2, thethickness L3 and the included angle θ1 may be shown in formula (2)below.

$\begin{matrix}{{\tan\;{\theta 1}} = \frac{{width}\mspace{14mu}{W2}}{{thickness}\mspace{14mu} L\; 3}} & (2)\end{matrix}$

The included angle θ1 may be varied according to different angles ofview (such as the angle of view θ1 shown in FIG. 9). In detail, when theoptical sensing module LSM includes different focal lengths, the angleof view (the included angle θ1 shown in FIG. 9) may be different. Inaddition, it can be seen from FIG. 9 that the value of the includedangle θ1 is half of the value of the included angle θ1. Therefore, afterthe values of the angle of view under different focal lengths areconfirmed, the value of the included angle θ1 may further be known. Forexample, when the focal length of the optical sensing module is 10 mm,the angle of view (the included angle θ1) may for example be 130.4degrees, and the value of the included angle θ1 is half of the value ofthe included angle θ1, Therefore, the included angle θ1 may be 65.2degrees when the focal length of the optical sensing module is 10 mm.Similarly, when the focal length of the optical sensing module is 45 mm,the angle of view (the included angle θ1) may for example be 51.4degrees, and the value of the included angle θ1 is half of the value ofthe included angle θ, that is, 25.7 degrees, but not limited thereto.The thickness L3 of the present embodiment may for example be the sum ofthe thickness of the substrate SB and the thickness of the driving layerDL. In detail, as shown in FIG. 9, the thickness L3 may be the maximumdistance between the bottom surface 102 of the substrate SB and thebottom surface (such as the surface 104 shown in FIG. 9) of the bottomelectrode (such as the anode) of the light emitting elements LM in thesecond direction D2. Therefore, the types of the substrate SB and thethickness of the driving layer may affect the value of the thickness L3.In some embodiments, the thickness L3 may be the maximum thickness fromthe bottom surface of the light emitting elements to the aperture in thesecond direction D2. In some other embodiments, the thickness L3 may bethe maximum thickness from the electrode of the light emitting elementsto the aperture in the second direction D2. According to the presentembodiment, the material of the substrate SB may for example includeglass, ceramic, quartz, sapphire, acrylic, polyimide (PI), polyethyleneterephthalate (PET), polycarbonate (PC), polyethersulfone (PES),polybutylene terephthalate (PBT), polyethylene naphthalate (PEN),polyarylate (PAR), other suitable materials or the combinations of theabove-mentioned materials, but not limited thereto. The thickness of thepolyimide substrate may for example be 7 micrometers (μm), and thethickness of the glass substrate may for example be 200 μm or 400 μm,but not limited thereto. In addition, the thickness of the driving layerDL may range from 7 μm to 10 μm, according to the demands of design, butnot limited thereto. Therefore, after the above-mentioned values aresubstituted into the formula (2), the range of the width W2 may beobtained. In detail, when the focal length of the optical sensing moduleLSM is 10 mm, the maximum width W2 may be 0.88 mm, and the minimum widthW2 may be 0.05 mm; when the focal length of the optical sensing moduleLSM is 45 mm, the maximum width W2 may be 0.195 mm, and the minimumwidth W2 may be 0.01 mm, but not limited thereto. It should be notedthat the values of the included angle θ1 and the thickness L3 of thepresent embodiment are only exemplary, and the present disclosure is notlimited thereto.

According to the present embodiment, after the range of the width W0 andthe range of the width W2 are obtained, the range of the width W1 of thesecond area A2 may be further calculated. In detail, as mentioned above,because the value of the width W1 is equal to the value of the width W0plus two times of the value of the width W2, when the focal length ofthe optical sensing module LSM is 10 mm, the maximum width W1 may be3.96 mm, and the minimum width W1 may be 0.43 mm; when the focal lengthof the optical sensing module LSM is 45 mm, the maximum width W1 may be10.28 mm, and the minimum width W1 may be 1.51 mm. That is, under thecondition that different focal lengths (for example, 10 mm to 45 mm, butnot limited thereto) of the optical sensing module LSM are satisfied,the width W1 of the coverage of the second area A2 in the firstdirection D1 is not greater than 10.28 mm and is not less than 0.43 mm(that is, 0.43 mm≤W1≤10.28 mm), but not limited thereto. In addition, asmentioned above, the width (width W0) of the aperture OP2 of the opticalsensing module LSM may be less than the width (width W1) of the coverageof the second area A2 in the present embodiment, wherein the differencebetween the width W0 and the width W1 is two times of the width W2.Therefore, by calculating the range of the width W2, it can be knownthat the difference between the width W0 and the width W1 is not greaterthan 1.76 mm and not less than 0.02 mm (that is, 0.02 mm≤widthdifference ≤1.76 mm), but not limited thereto. It should be noted thatthe range of the width W1 of the present embodiment may be applied toeach of the embodiments and variant embodiments of the presentdisclosure. For example, the ranges of the widths W1 of the coverage CRof the second areas A2 shown in FIG. 3 to FIG. 8 may be the same as therange of the width W1 of the present embodiment, but not limitedthereto.

In addition, as mentioned above, because the optical sensing module LSMof the present disclosure may be disposed corresponding to the secondarea A2, the pixels in the second area A2 may be further designed (forexample, the pixels in the second area A2 may include smaller sizeand/or lower density, or the adjusting pixels may further be disposed inthe second area A2), such that the transmittance of the second area A2may be increased, thereby increasing the amount of lights entering theoptical sensing module LSM. Because the second portion R2 and the thirdportion R3 may be located in the second area A2 in the presentembodiment, the pixels in the second portion R2 and the third portion R3may include different designs, which may refer to the above-mentionedembodiments and variant embodiment. As shown in FIG. 9, the densities ofthe pixels in the second portion R2 and the third portion R3 may forexample be less than the density of the pixels in the first portion R1,and the density of the pixels in the second portion R2 may be the sameas the density of the pixels in the third portion R3, but not limitedthereto. In some embodiments, the density of the pixels in the firstportion R1 may be the same as the density of the pixels in the thirdportion R3, and the density of the pixels in the first portion R1 isgreater than the density of the pixels in the second portion R2. In someembodiments, the density of the pixels in the first portion R1 may begreater than the density of the pixels in the third portion R3, and thedensity of the pixels in the third portion R3 is greater than thedensity of the pixels in the second portion R2. In some embodiments, thepixels in the second portion R2 and the third portion R3 and the pixelsin the first portion R1 may include the same density and differentsizes. In some embodiments, the adjusting pixels may be disposed in thesecond portion R2 and the third portion R3. In some embodiments, thepixel densities of the first portion R1, the second portion R2 and thethird portion R3 may be the ratios of the numbers of the pixels in thefirst portion R1, the second portion R2 and the third portion R3 to thecorresponding areas of the first portion R1, the second portion R2 andthe third portion R3 respectively. Therefore, if it is determined thatthe pixels in the first portion R1, the second portion R2 and the thirdportion R3 are arranged regularly in the first direction D1 and thesecond direction D2, the comparison of the pixel densities in twodifferent portions may be performed by comparing the distances betweenadjacent two of the pixels in the two different portions in across-sectional view. When the density of the pixels in a portion isgreater, the distance between adjacent two of the pixels in the portionmay be lower. For example, as shown in FIG. 9, if the density of thepixels in the second portion R2 and the density of the pixels in thethird portion R3 are to be compared, wherein the distance r2 is includedbetween adjacent two of the pixels in the second portion R2, and thedistance r3 is included between adjacent two of the pixels in the thirdportion R3, because the distance r2 is equal to the distance r3, thedensity of the pixels in the second portion R2 and the density of thepixels in the third portion R3 may be the same. If the density of thepixels in the first portion R1 and the density of the pixels in thesecond portion R2 are to be compared, wherein the distance r1 isincluded between adjacent two of the pixels in the first portion R1, andthe distance r2 is included between adjacent two of the pixels in thesecond portion R2, because the distance r2 is greater than the distancer1, the density of the pixels in the second portion R2 may be less thanthe density of the pixels in the first portion R1, and vice versa.

Referring to FIG. 10, as well as FIG. 3 to FIG. 8, FIG. 10 schematicallyillustrates the driving process of the electronic device according tothe first embodiment of the present disclosure. The driving process ofthe electronic device mentioned below may be applied to the embodimentsand variant embodiments shown in FIG. 3 to FIG. 8, and the drivingprocess may include the following steps.

S100: normal display mode. In normal display mode, the pixels in thefirst area A1 and the second area A2 may be driven by the driving layerDL to display images according to the demands of display. It should benoted that when the second area A2 of the display device 100 includesthe adjusting pixels PX3, the adjusting pixels PX3 may not be turned onin the normal display mode, but not limited thereto. The “turn on” ofthe pixels mentioned here may represent that the pixels are changed fromthe “off” state to the “on” state, or the pixels in the “on” state aremaintained in the same state, in addition, the “turn off” of the pixelsmay represent that the pixels are changed from the “on” state to the“off” state, or the pixels in the “off” state are maintained in the samestate, but not limited thereto. The definitions of “turn on” and “turnoff” of the pixels may be applied to the contents in the following, andwill not be redundantly described.

S102: entering the light sensing mode. When the users want to use thefunctions of the optical sensing module LSM, the light sensing mode maybe entered through specific programs of the electronic device (or thedisplay device 100) or other suitable methods.

S104: turn off the pixels in the second area and turn on the pixels inthe first area. When the users enter the light sensing mode, because theoptical sensing module LSM is disposed corresponding to the second areaA2, the pixels in the second area A2 may be optionally turned off toreduce the effect of lights on the sensing result, in addition, thepixels in the first area A1 may be turned on to perform normal displayfunctions, but not limited thereto. In some embodiments, the pixels inthe first area A1 may be optionally turned off in the light sensingmode.

S106: confirm whether to end the light sensing mode. After the usersfinish using the functions of the optical sensing module LSM, the lightsensing mode can be ended in any suitable way.

S108: turn on the pixels in the second area in the normal display mode.After the light sensing mode is ended, the pixels in the second area A2may be turned on to return to the normal display mode to display images.When the second area A2 of the display device 100 includes the adjustingpixels PX3, the adjusting pixels PX3 may optionally be turned off in thenormal display mode, but not limited thereto.

Referring to FIG. 11, as well as FIG. 9, FIG. 11 schematicallyillustrates the driving process of the electronic device according tothe third embodiment of the present disclosure. The driving process ofthe electronic device of the third embodiment of the present disclosuremay include the following steps.

S200: normal display mode. In normal display mode, the pixels in thefirst portion R1, the second portion R2 and the third portion R3 may bedriven by the driving layer DL to display images according to thedemands of display. In addition, when the second portion R2 and/or thethird portion R3 include the adjusting pixels PX3, the adjusting pixelsPX3 may not be turned on in the normal display mode, but not limitedthereto.

S202: entering the light sensing mode. When the users want to use thefunctions of the optical sensing module LSM, the light sensing mode maybe entered through specific programs of the electronic device (or thedisplay device 100) or other suitable methods.

S204: turn off the pixels in the second portion and the third portion,and turn on the pixels in the first area. When the users enter the lightsensing mode, because the optical sensing module LSM is disposedcorresponding to the second portion R2 and the third portion R3, thepixels in the second portion R2 and the third portion R3 may beoptionally turned off to reduce the effect of lights on the sensingresult, in addition, the pixels in the first portion R1 (the first areaA1) may be turned on to perform normal display functions, but notlimited thereto. In some embodiments, the pixels in the first portion R1may be optionally turned off in the light sensing mode.

S206: confirm whether to end the light sensing mode. After the usersfinish using the functions of the optical sensing module LSM, the lightsensing mode can be ended in any suitable way.

S208: turn on the pixels in the second portion and the third portion inthe normal display mode. After the light sensing mode is ended, thepixels in the second portion R2 and the third portion R3 may be turnedon to return to the normal display mode to display images. When thesecond portion R2 and/or the third portion R3 of the display device 100include the adjusting pixels PX3, the adjusting pixels PX3 mayoptionally be turned off in the normal display mode, but not limitedthereto.

In summary, an electronic device including an optical sensing module isprovided by the present disclosure, wherein the pixel region of theelectronic device may be divided into the first area and the secondarea, and the optical sensing module can be disposed corresponding tothe second area. Because the pixels in the second area of the pixelregion may include special designs such as the lower size or lowerdensity, or the second area may include adjusting pixels, thetransmittance of the second area may be greater than the transmittanceof the first area. Therefore, the amount of the lights entering theoptical sensing module disposed corresponding to the second area may beincreased through the second area of the pixel region, thereby improvingthe performance of the optical sensing module.

Those skilled in the art will readily observe that numerousmodifications and alterations of the device and method may be made whileretaining the teachings of the disclosure. Accordingly, the abovedisclosure should be construed as limited only by the metes and boundsof the appended claims.

What is claimed is:
 1. A display panel, comprising: a pixel region whichhas a plurality of pixels and comprises: a first area; and a second areawhich is greater than the first area in a transmittance, wherein thesecond area has a coverage with a width of not less than 0.43 millimeter(mm).
 2. The display panel as claimed in claim 1, wherein the width ofthe coverage of the second area is not greater than 10.28 mm.
 3. Thedisplay panel as claimed in claim 1, wherein the greater transmittanceof the second area is made by a less density of the pixels in the secondarea in comparison with the first area.
 4. The display panel as claimedin claim 1, wherein the greater transmittance of the second area is madeby a smaller size of the pixels in the second area in comparison withthe first area.
 5. A display device, comprising: the display panel asclaimed in claim 1; and an optical sensing module disposed correspondingto the second area of the pixel region of the display panel and havingan aperture being able to accept lights through the second area, whereinthe aperture has a width less than the width of the coverage of thesecond area.
 6. The display device as claimed in claim 5, wherein thewidth of the aperture and of the coverage of the second area is in adifference of not less than 0.02 mm.
 7. The display device as claimed inclaim 5, wherein the width of the aperture and of the coverage of thesecond area is in a difference of not greater than 1.76 mm.